Ultrasound screening of fetal structural abnormalities at 12 to 14 weeks in Hong Kong.
D000328:Adult; D000013:Congenital Abnormalities / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000196:embryology; D005260:Female; D005333:Fetus / Q000002:abnormalities*; D006723:Hong Kong; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods; D011446:Prospective Studies; D016216:Ultrasonography, Prenatal / Q000379:methods